Finding the Fourth Proportional to 1,694.31, 2,338.86 and 1,031.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,694.31 : 2,338.86 = 1,031.40 : x
2. Step 2: Convert to fraction form
   1,694.31/2,338.86 = 1,031.40/x
3. Step 3: Cross multiply
   1,694.31x = 2,338.86 × 1,031.40
4. Step 4: Simplify right side
   1,694.31x = 2,412,300.20
5. Step 5: Solve for x
   x = 2,412,300.20/1,694.31
6. Step 6: Final answer
   x = 1,423.77